Yes webbo, I completely understand your reasoning; price and availability rule when it comes to the common buyer, and I totally agree here.
Not particularly this but as I said before, many other sites the put the 4670 too much on the personal with the GSO. Yes especially where I live or in the USA it is an absolute steal, however, there are other scenarios the 4670 is the way to go and maybe that could have been made clearer in the conclusions, because it's there that most people jump before reading the whole review and sometimes it does not just "come down to what screen you are looking to game on"; I couldn't use my HD3850 in my sister's 350W PSU PC, and had to swap it with a 4670 first. People seeking quad display with graphics performance will get lots of power savings and cooler systems with two of them compared to two 9600GSOs or 3850s.
The fan is loud, yes, that aluminum heatsink is Sapphire's way to spare some money,the stock cooler is much better. I have also seen a dual slot version from asus, big silent fan on top, that should be nice for HTPCs.
Anyway, let me say that your review was very precise and well made,was interesting to see the slight superiority of the 9600GSO, with the 4670 taking over @ high resolutions, probably because of the 512M of RAM vs 384 of the GSO.
P.S: Just a small question on the sapphire cooler, was it loud or very loud, because I think this is the model I am getting to replace the 3850.